如何获得当前正在展示的activity

首先加个权限: 

<uses-permission android:name="android.permission.GET_TASKS"></uses-permission> 

代码：

ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);  List<RunningTaskInfo> runningTasks = manager .getRunningTasks(1);  RunningTaskInfo cinfo = runningTasks.get(0);  ComponentName component = cinfo.topActivity;  Log.e("currentactivity", component.getClassName());

得到的是当前activity的包加类名